skinner



April 29, 1924. 1,491,828 A. W. SKINNER DAY CALCULATOR Filed Dec. 29, 1922 JAN FEB HAR A1311v HAY JUN JUL AUG SP OCT NOV DEC JAN FEB HAR Am, HAY JUN 1171 l 1 1 1 1'-` 1e 1"'11 171T1|11311z` 2 2 L Z Z i Z Z. 2. Z 7| Z101 2.131 216) 3 l 3 3 3 3 3 5 3 3 7l 310) 5133 31 4 e 4 4 4 4 4 4 a q 75 41011 41:11 4165 s 5| 5 5 5 5 5 5 5 s 7A 5105 5155 5 las s l e a s a e a e a 75 @ma e136 311,7 7 7 1 7 7 7 7' 7 7 7' 7 76 7161 7137 7168 u E 8 a 8 E e e 817 8101191385169 9 9 E E 9 9 9 l 3 9 73l09 31399170 1c lo 1o 10 10 lo 10 10 1o 10 lo 7910110 1014010 17| 1| l1 11 1| 11 1l 11 1| 11 11 11601111111111111172 1*-'12 I2 1l 12 12 IZ 12 12 12 12 I2 8l 111121214112175 13 13 13 l5 13 15 I3 13 13 15 131131514313174 I4 14 14 14 14 I4 14 I4 I4 I4 1411414 14414175 15 15 15 1s 15 15 l5 15 15 l5 15115 15111515176 |11 16 16 16 16 16 I6 1G l5 16 11G 16145 16177 17 I7 17 17 17 17 17 17 17 1711717 147 17 |78 15 1e 1e IB le 1e 18 la 1e 15118191 10179 19 19 19 19 19 19 I9 y19 I9 I9 |1919 vw 171m, Z Z0 20 Z0 20 Z0 Z0 ZO Z0 2O 1Z0 Z0 ZI Z1 2| ZI ZI 2| Z1 21-21 |1c1z11512l182 2L l 22 zz Zz 2z zz zz 1 2z 22122 2L 151 21183 t3 23 13 z3 n Z3 23 z3 a z5 2312325153 131e 24 ze za Z4 24 24 za 24 314 Z4 .u 165 z5 z5 25 z5 z5 25 25 2s 4 z5 z5 1? f n Z6 Z6 Z6 Z6 Z6 25 Z6 26 526 L |5626 27 z7 z7 17 127 27 17 Z7 627 21 |27 27 157 27 le z8 ze 26 2B 2e i8 ze 71a un 15922 u Z9 ze ze ze za :a c ze ze 12929 15919 3a po so 311 3o 311 3u 9 5a 30131130 1m30 131 311 h ;11L 31 w31 L@131161 E U1 UL i U n E OCT NCN DE .Al' WR hA UN WA. 1 52 sa s1 121 152- z 33 a1 92 122 |53 31 52 ao 12| 151 wz 3l n 3B Patented Apr. 29, 1924. y

ADCLPHW. SKINNER, or MONTREAL, QUEBEC, CANADA:

l l'DAY CALCULATOR.

Application led December 29,1922. Serial No. 609,613.

To all whom t may concern:

Be it knowny that I, ADoLrH WESLEY SKINNER, a citizen of the United States of America,and residing at Montreal, 'in' the Province of Quebec, rin the Dominion of Canada, have invented a new andv useful Day Calculator, of whichthel followingfis the specification. n

- The invention relates toa day'calculator as described in the present `specification and shown in the accompanying drawings that form part of the same. i

The inventionr consists essentially of the novel features pointed out broadly* and specifically in the claims for novelty following a description containingan explanation in detail of an acceptable form ofthe invention.

The objects of the invention are to furnish to bankers and others interested in the ready calculation of periods in daysa calendarwith a change sheet that will enable the user to see at aglance the exact-numberof days from one date to another specifically in banking from the dayl a note is discounted to the day of maturity, so that the interest may be determined by reference to an accompanying table as `customary in the business of money lending; to'k eliminate the errors due to careless calculations; to'f'economize in time and labor in business and other institutions and wherever this device may be applicable; and generally to provide a ready reckoner, simple as to its parts and not liable to get out of order and efficientin operation.

In the drawings, Figure 1 is a lan view of the device showing the expose face, the calendar and the change sheet therebelow.

Figure 2 is a fragmentary detail of the change sheet.

Figure 3 is a longitudinal and sectional view through the casing;

Figure 4 is a cross sectional View on the line 4 4 in Figure 1. y

Figure 5 is a perspective detail of a reel core.

Figure 6 is a perspective detail of an operating rod and knurled knob.

Like numerals of reference indicate corresponding parts in the various figures.

Referrinor to the drawings, the casing 1 is preferably made in the shape of a rectangular box having a lid or plate 2 fitting thereinto and secured by the screws 3 to the bosses 4, and having narrow slits or openings 5 and 6 between itself and each longitudinal wall. The walls of the box 1 project slightly above the plate 2 Vand on this plate the calendar 7 is laid.

The calendar 7 is made of card board or any other suitable sheet material and is formed with eighteen vertical slots 8 or as many asy may be found desirable, though here shown as eighteen, so as to clearly ex plain the invention.

To the left of the slots 8 the days of the months are enumerated, and above and below these figures the names of the calendar months are shown from January to December and from January to June.

The calendar 7 is covered by a transparent sheet of celluloid 9 or by glass or other transparent vmaterial and this is held in place'by the flanged rims l() screwed to the casing walls or otherwise secured.

It is obvious that this construction may be considerably modified and that it is only for greater clearness that the details are shown and described.

The change sheet 11 passes under the calendar 7 and over the plate 2 and through the slits 5" and 6.

The change sheet llcontains a plurality of columns of figures running consecutively from n1 to 32, 1 to 63, 1 to 91, 1 to 122, 1 to 152,1 to 183, 1 to 184,1 m18/1, 1 to 187, 1 to 186, 1 to 187, 1 to 186, 1 to 187, 32 to 187, 60 to 184, 91 to 185, 121 to 184 and 152 to 185.

The numeral 1 is set forward one calendar month in each column reading from the bottom, according to the number of days in the respective months of the year, and this l means that by reading across the calendar from the day of discounting a bill to the day of maturity, the exact number of days of the term will appear to the right of the day of maturity.

The change sheet 11 is preferably made of linen, or it may be of paper or any flexible material, and it is'reeled on the cores 12 and 13 each of said cores being hollow and having the longitudinal split 14 into which the sheet is pinched adjacent to the ends and held by the wedge strips 15. The cores 12 and 13 are each formed at one end with a spring recess 16 slightly larger than the bore 17 and into which the springs 18 are introduced.

The rods 19 and 20 are inserted through the cores 12 and 13 and held by the set screws 21 and at one end the knurled lmobs 22 and 23 are mounted and by means of these knobs the change sheet 11 is wound on the cores l2 and 13 until it is stretched tightly across the plate 2 under the calendar 7 and over the plate 2, the springs 18 vholding the cores to keep the sheet tight.

In the use of this invention the change sheet is set by turning one or other of the knobs until the beginning of a column comes to the day from which the calculation is to be made, and by looking to the right of any date thereafter, which may happen to be the date of maturity, the change sheet will disclose through the vertical slot the number of days on which interest is to he calculated.

In the form of" the invention illustrated provision has been made for days of grace in the matte-r of bills of exchange, but this will not be required in some States and thereafter modification may be made to suit surrounding conditions of use.

It is also desirable for the banking business to have Sundays and holidays printed in a contrasting color on the calendar, thus necessitating the change of the calendar yearly, otherwise it is perpetual, but it is an extremely simple matter to change and adds no material expense in the production of the device, though for such changes it may be advisable to alter the construction to facilitate the replacement of the calendar from one year to the other.

IVhat I claim is j l. In a day calculator, a calendar showing the months in consecutive order for a predetermined period and the daysof each month in adjacent rows and a change Sheet having adjacent rows of figures starting from the unit one in each row and taking in the full period permitted bythe calendar and adapted to appear beside the rows of calendar days respectively and to be adjusted to read from any particular day on said calendar.

2. In a day calculator, a calendar for a chosen riod having the days of each month Set fort i in rows on a sheet and slots through the sheet, and a change sheet having adjacent rows of figures starting from the unit one in each ro'a7 and taking in the full period permitted by the calendar and adapted to appear beside the rows of calendar days respectively fand to be adjusted to read from any particular day on said calendar.

3. In a dayV calculator, a calendar for a chosen period having a plurality of vertical slots in a sheet and the days of each month in vertical rowsbeside the slots respectively, and a. change sheet having adjacent rows of figures starting from the unit one in each row and taking in the full period permitted by thecalendar` and adapted to appear beside the rows of calendar days respectively, and to be adjusted to read from any particular da on sald calendar.

4. In a day ca culator, a sheet calendar having the months set forth in a row thereacro for a predetermined period, and the days in vertical rows to the left of said slots, and a change sheet having adjacent rows of figures starting from the unit one in each row and taking in the full period permitted bythe calendar and adapted to appear beside 'the rows of calendar days respectively, and to be adjusted to read from any particular day on said calendar.

Signed fit/Montreal, Canada, this 22d day of December, 1922.

A. W. SKINNER. 

